java LinkedList模拟堆栈

import java.util.LinkedList;
import java.util.List;
import java.util.Scanner;
import java.util.Stack;
/*
 * LinkedList模拟堆栈
 */
class stackList{
	private LinkedList<String> stack;
	public stackList()
	{
		stack=new LinkedList<String>();
	}
	public void push(String e)
	{
		stack.push(e);//stack.addFirst()
	}
	public String pop()
	{
		return stack.pop();//stack.removeFirst()
	}
	public boolean isEmpty()
	{
		return stack.isEmpty();
	}
	
}
public class t12_7 {


	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner input=new Scanner(System.in);
		stackList stack=new stackList();
		System.out.println("请输入数据(quit)结束");
		while(true)
		{
			String str=input.next();
			if(str.equals("quit"))
				break;
			stack.push(str);
		}
		System.out.println("先进后出的序列：");
		while(!stack.isEmpty())
			System.out.println(stack.pop());
	}


}

请输入数据(quit)结束
a b c d e quit
先进后出的序列：
e
d
c
b
a